JS tests: add Node.js 16 (#33720)

Author: XhmikosR

.github/workflows/js.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node: [10, 12, 14]
+        node: [10, 12, 14, 16]
 
     steps:
       - name: Clone repository